Irukandji warning: deadly jellyfish will be 'fired up' by north Queensland's big wet

Tiny creatures prefer calm, warm waters - with risk of stings increasing after rainfall

Irukandji jellyfish may be elusive during far north Queensland's big wet but they're set to come back in big numbers when the sun comes out.

After they forced the closure of two northern Queensland beaches last weekend, including Ellis Beach near Cairns when a teenage girl was admitted to hospital with stings to her upper body, no irukandji have been spotted in swimming areas since.